An eastbound Union Pacific coal train drops off the mesa that contains Big 10 Curve and is about to pass over the west switch of Rocky siding on Colorado’s Moffat Tunnel line on April 28, 2002. ... (more)

The California Zephyr passes a waiting Union Pacific coal train at Rocky, Colorado.

The westbound Rocky Mountaineer tour train works toward Big 10 Curve west of Rocky, Colorado, on October 12, 2022. The eleven-car train will soon be on the upper level of track at the east switch ... (more)

UP 8330 (SD70ACe) gets ready to leave the siding at Rocky, Colorado with a loaded coal train after the California Zephyr passed and is heading towards Big Ten Curve on the Moffat Tunnel Sub. ... (more)

A trio of Rio Grande EMD GP40-2 take Union Pacific’s West local eastbound out of Rocky, Colorado, back to Denver on the Moffat Tunnel Subdivision on October 18, 2001.

The California Zephyr runs towards a waiting Union Pacific coal train at Rocky, Colorado.

Amtrak’s westbound California Zephyr climbs the two percent grade up the Front Range of the Rocky Mountains west of Denver, Colorado, on October 12, 2022. The train is approaching Big 10 Curve b... (more)

Following Amtrak train 5 a few blocks behind (Amtrak was exiting Tunnel 2 as this train approached West Rocky), the westbound Rocky Mountaineer tour train works toward Big 10 Curve west of Rocky, ... (more)

Amtrak’s westbound California Zephyr climbs out of Rocky, Colorado, on October 12, 2022, with private car “Northern Sky” carrying the markers. This dome-observation “Grand Touring Car” i... (more)

Amtrak’s westbound California Zephyr climbs out of Rocky, Colorado, on Union Pacific’s Moffat Tunnel Subdivision on the morning of October 12, 2022. Trailing the Superliner consist this day is... (more)

The California Zephyr runs through Rocky, Colorado pulling the bright yellow Promontory Point private car.

BNSF 5321 (Dash 9) shoves a freight through Big Ten Curve as it passes a field of wild sunflowers at Rocky, Colorado.

The California Zephyr 5 train heads towards Big Ten Curve at Rocky, Colorado and will soon be running through 30 tunnels to get to the west side of the Continental Divide.

The California Zephyr had three private cars on the back, including Webb Rail 800007, a beautiful New York Central Sleeper/Observation car built in 1949.

Amtrak engine 174 (P42DC) leads the California Zephyr through the Big Ten Curve at Rocky, Colorado. The area is dedicated as a natural open space, which is refreshing to think that high priced ho... (more)